Tests of
DELCOTRON
INTEGRAL
CHARGING
SYSTEM
(25-SI Type)
Fig. 1. Typical integral charging system
models and IS to be connected only to battery nega-
INTRODUCTION
tive. An "R" terminal is provided for use in some
circuits to operate auxiliary equipment.
The Integral Charging System shown in Figure 1
and Figure 2 is a self-rectifying, brushless unit
The hex head bolt on the output terminal is elec-
f e a t u r i n g a built-in voltage regulator. The only
trically Insulated; no voltage reading can be ob-
moveable part tn the assembly is the rotor. which is
tained by connecting to the hex head.
mounted on a ball bearing at the drive end. and a
roller bearing at the rectifier end All current-carry-
i n g conductors are stationary These conductors
OPERATING PRINCIPLES
are the field winding. the stator windings. the six
rectifying diodes. and the regulator circuit compo-
The diagram is in Figure 3. The operating prin-
nents. The regulator and diodes are enclosed in a
ciples are explained as follows.
sealed compartment The regulator is serviced by
complete replacement only
As the rotor begins to turn, the permanent mag-
netism therein induces voltages in the stator wind-
A fan located on the drive end provides airflow
ings Current then flows through diodes D1, D2 and
for cooling. Extra large grease reservoirs contain
an adequate supply of lubricant so that no periodic
back to the stator winding Transistors TR1 and
maintenance of any kind IS required.
TR2 then turn on, and the battery supplies current
Only one wire is needed to connect the Integral
through resistor R5. the field coil, and TR1. Current
also flows from the battery through R5, R2 and R4.
Charging System to the battery. along with an ade-
quate ground return The specially designed output
terminal IS connected directly to the battery A red
output terminal IS used on negative ground models.
As system voltage increases, a voltage across
and IS to be connected only to battery positive A
R4 is impressed across diodes D5 and D6, caused
black output terminal IS used on positive ground
by current flow through R5, R2 and R4 When the
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